no
yes. After the substantive examination of the invention patent application, the patent applicant can submit a request and pay the prescribed conversion request fee to convert the patent type from invention to utility model. If the invention patent does not meet the conditions for granting a patent, a request for conversion may be filed within three months from the date of issuance of the rejection document of the invention patent.
5-6 years
yes. Please consult IPVN for the standards and charges for restoring the priority.
20 years
no
no
10 years
no
- via Paris Convention : 12 months from earliest priority date.
- via Nationalization of PCT : 31 months from earliest priority date.
Vietnam State Intellectual Property Office
English: Intellectual Property Office of Viet Nam, Abbreviation: IPVN
Website: Trang chủ - CỤC SỞ HỮU TRÍ TUỆ (ipvietnam.gov.vn)
Vietnam Utility Model Patent Search: IP Viet Nam